Monomorium jacksoni

AntWiki: The Ants --- Online
Monomorium jacksoni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Solenopsidini
Genus: Monomorium
Species: M. jacksoni
Binomial name
Monomorium jacksoni
Bolton, 1987

Monomorium jacksoni casent0902231 p 1 high.jpg

Monomorium jacksoni casent0902231 d 1 high.jpg

Specimen Labels

This species has been found numerous times in rainforest litter samples.

Identification

Bolton (1987) - A member of the hanneli species group. Very closely related to Monomorium invidium, which also occurs at the type-locality of jacksoni, but the latter with much stronger sculpture on the propodeal dorsum and sides of the alitrunk, and with smaller and less prominent clypeal teeth.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: -3.125556° to -3.125556°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.
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Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.
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Biology

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • jacksoni. Monomorium jacksoni Bolton, 1987: 427 (w.q.) CAMEROON.
    • Type-material: holotype worker, 12 paratype workers, 1 paratype queen.
    • Type-locality: holotype Cameroon: Nkoemvon, 12.i.1980 (D. Jackson); paratypes: 7 workers, 1 queen with same data, 5 workers with same data but 5.i.1980.
    • Type-depositories: BMNH (holotype); BMNH, MCZC, MHNG (paratypes).
    • Status as species: Bolton, 1995b: 263.
    • Distribution: Cameroon.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Holotype. TL 2.0, HL 0.46, HW 0.39, CI 85, SL 0.32, SI 82, PW 0.29, AL 0.55.

Mandibles unsculptured except for hair-pits. Median portion of clypeus flanked by a pair of short triangular denticles which are not strongly prominent, but the edges of the median clypeal bicarination V-shaped and very sharply defined. Eyes small, maximum diameter 0.15 x HW and with only 3 ommatidia in the longest row. Eye consisting of only 6 ommatidia in total, without central ommatidia surrounded by a peripheral ring. Promesonotum shallowly convex, the metanotal groove weakly impressed. Propodeal dorsum behind the metanotal groove sloping posteriorly; dorsum and declivity separated by a blunt angle. Dorsum of propodeum marginate laterally, the marginations diverging posteriorly. Petiole and postpetiole shaped as in invidium (Fig. 98). Cephalic dorsum smooth, unsculptured except for hair-pits and some short faint costulae behind the frontal lobes. Sides of head mostly unsculptured but the strip of cuticle between the eye and the mandibular insertion sculptured, this sculptured strip being slightly wider than the eye itself. Promesonotum glassy smooth everywhere, mesopleuron sculptured except for a smooth patch posterodorsally. Metapleuron completely sculptured as is the propodeal side except for a smooth area around the spiracle. Propodeal dorsum conspicuously transversely rugulose, the spaces between the rugulae punctate. Petiole, postpetiole and gaster unsculptured in dorsal view. All dorsal surfaces of head and body with numerous standing hairs. Colour of head and body blackish brown.

Paratypes. TL 1.8-2.0, HL 0.44-0.47, HW 0.38-0.40, CI 85-89, SL 0.30-0.34, SI 79-85, PW 0.27-0.30, AL 0.52-0.56 (12 measured). As holotype but eyes with maximum diameter 0.14-0.15 x HW and with 6-7 ommatidia in total. In some almost the upper third of the mesopleuron is unsculptured.

Type Material

Holotype worker, Cameroun: Nkoemvon, 12.i. 1980 (D. Jackson) (The Natural History Museum). Paratypes. 7 workers and 1 female with same data as holotype; 5 workers with same data but 5.i.1980 (BMNH; Musee d'Histoire Naturelle Genève; Museum of Comparative Zoology).

References